Writing instrument



FIG. 1 is a top perspective view of a writing instrument showing our new design;

FIG. 2 is a front view of the same writing instrument;

FIG. 3 is a back view of the same writing instrument;

FIG. 4 is a right side view of the same writing instrument, the left side view being a mirror image of the right side view;

FIG. 5 is an enlarged top view of the same writing instrument; and,

FIG. 6 is an enlarged bottom view of the same writing instrument.

The broken lines shown in the drawings illustrate features of the article to which the design is applied that form no part of the claim. 

We claim the ornamental design for a writing instrument, as shown and described. 